Remove flowers from box immediately. While keeping the heads wrapped, cut 1 inch off the stems and put each bunch in water. Leave wrapped bunches in water for an hour before unwrapping heads to arrange into vases. Remove outer protective petals from roses and any greens from the part of the stems that will be in water. Greens can contaminate the water which could contaminate your flowers. If heads droop submerge entire flower in water for one hour to re-hydrate. Re-cut stems and change water on the third day you've had your flowers. For best results, display your roses away from direct sunlight, extreme heat or cold.